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Excelchem Environmental Labs <br /> DTE Stockton,LLC Project: Ash <br /> 2526 W.Washington St. Project Number: 4701052861 Date Reported: <br /> Stockton,CA 95203 Project Manager: Dan Crawford 11/15/17 17:57 <br /> Total Recoverable Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch A[KO100-EPA 6010B <br /> LCS Dup(A[KO100-BSD1) Prepared&Analyzed: 11/14/17 <br /> Antimony 97.8 1.0 mg/kg 100 97.8 80-120 0.611 25 <br /> Arsenic 97.9 1.0 100 97.9 80-120 0.469 25 <br /> Arsenic 97.9 1.0 100 97.9 80-120 0.469 25 <br /> Barium 94.3 2.0 100 94.3 80-120 1.57 25 <br /> Beryllium 97.6 0.5 100 97.6 80-120 0.766 25 <br /> Cadmium 96.7 1.0 100 96.7 80-120 0.895 25 <br /> Chromium 99.7 1.0 100 99.7 80-120 0.730 25 <br /> Cobalt 99.4 5.0 100 99.4 80-120 1.13 25 <br /> Copper 99.5 2.0 100 99.5 80-120 0.791 25 <br /> Lead 99.5 1.0 100 99.5 80-120 0.980 25 <br /> Molybdenum 100 1.0 100 100 80-120 0.0998 25 <br /> Lead 99.5 1.0 100 99.5 80-120 0.980 25 <br /> Nickel 98.6 1.0 100 98.6 80-120 0.718 25 <br /> Selenium 95.0 2.0 100 95.0 80-120 0.954 25 <br /> Silver 95.1 1.0 100 95.1 80-120 0.931 25 <br /> Thallium 98.9 2.0 100 98.9 80-120 0.746 25 <br /> Vanadium 98.1 2.0 100 98.1 80-120 0.731 25 <br /> Zinc 98.7 2.0 100 98.7 80-120 0.797 25 <br /> Matrix Spike(A[KO100-MS1) Source:1711070-01 Prepared&Analyzed: 11/14/17 <br /> Antimony 36.1 1.0 mg/kg 100 0.707 35.4 75-125 QM-01 <br /> Arsenic 114 1.0 100 18.2 95.5 75-125 <br /> Arsenic 114 1.0 100 18.2 95.5 75-125 <br /> Barium 426 2.0 100 360 65.6 75-125 QM-01 <br /> Beryllium 89.1 0.5 100 0.110 89.0 75-125 <br /> Cadmium 93.1 1.0 100 1.05 92.1 75-125 <br /> Chromium 118 1.0 100 29.8 87.7 75-125 <br /> Cobalt 89.5 5.0 100 7.07 82.4 75-125 <br /> Copper 264 2.0 100 156 107 75-125 <br /> Lead 111 1.0 100 33.2 77.8 75-125 <br /> Molybdenum 89.6 1.0 100 2.66 87.0 75-125 <br /> Nickel 103 1.0 100 22.4 80.7 75-125 <br /> Lead 111 1.0 100 33.2 77.8 75-125 <br /> Selenium 87.5 2.0 100 ND 87.5 75-125 <br /> Silver 83.9 1.0 100 ND 83.9 75-125 <br /> Thallium 75.6 2.0 100 ND 75.6 75-125 <br /> Vanadium 115 2.0 100 34.7 80.2 75-125 <br /> Zinc 370 2.0 100 298 72.4 75-125 QM-01 <br /> Excelchem Environmental Lab. The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 8 of 17 <br />